You’d be surprised at how many amateurs operate stations that are entirely indoors. By “entirely indoors,” I mean stations that exist completely within the confines of the homes in which the operators live. Some hams can install semi-invisible antennas outdoors by cleverly hiding wires along exterior walls, or by exploiting the classic ruse of using rain gutters as antennas, but this book is devoted to those who lack even that luxury. When I say “HF indoors,” I mean that everything is indoors – including the antenna system.